In the process of building appium environment, various errors will appear when running appium doctor — IOS command.

Error 1: dB and IDB_companion are not installed

Solution:

1. Update MAC system and Xcode software

2. Run command

brew tap facebook/fb
brew install idb-companion
pip install fb-idb

Just.

Error 2: opencv4nodejs cannot be found

1. Install cmake and check the version

cmake -version

2. Run command

npm -g install opencv4nodejs --ignore-scripts

Just.